Insects and Sprays 255 



Fungus diseases can usually be controlled by 

 spraying with Bordeaux mixture (see index). The 

 number of sprays will be determined by the crop 

 of insects, the weather, and other conditions. 

 Usually from three to five sprays will be sufficient. 



When a plant is suffering from a bacterial disease, 

 i. e., a disease caused by the multiplication of 

 bacteria in the water canals of a plant, the diseased 

 plant should be pulled up and destroyed that the 

 disease may not be spread to other plants. Burn- 

 ing is the only safe method of destruction. The 

 plant should not be allowed to touch other plants 

 when taking it from the garden. 



Insects that suck a plant can nearly always be 

 destroyed by spraying with a strong solution of 

 nicotine. This is made by boiling a pound of plug 

 or smoking tobacco in two gallons of water, or by 

 soaking it for twenty-four hours in cold or luke- 

 warm water. Boiling extracts all of the strength, 

 however. 



Worms on plants will usually be suffocated by 

 dusting the plant with Persian insect powder mixed 

 with lime in the proportion of one ounce of pow- 

 der to four ounces of lime. This should be used 

 several times during the course of a week. 



